Safety device for machine operators.



N. B. KEYBS.

SAFETY DEVICE FOR MACHINE OPERATORS.

APPLICATION FILED FEB 16 1914 llfiw l 92; Patented Apr. 14, 1914.

WITNESES: IN VENTOR. 2 444, f fij-y Nelson B. eyefi:

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' power press M J it .n. .JlLti its til i... sin. it. mi

HELSUN B. KEYIEi-i, 0E UNIONVILLE, CONNECTICUT. A55

OF -llll'llli)IKTVILLE, CUNNECTIC SAFETY DEVICE F913, Ii IAfiHIN'E UPEIRAIURS.

To (ZZZ EU/Z0777, it may concern.

lie it known that It, Nelson B. lTnyns, a citizen of the United States, and resident of Unionville, in the county of Hartford, State of Connecticut, have invented certain new and useful Improvements in Safety Devices for Machine @peretors, of which the following is a. specification.

' This invention is designed to prevent injury to the operatives of machinery such as drop pnesses, power presses, and the like, by providing niezins actuated by a. moving; part of the machine and before the dies have closed, for Withdrawing the operetives hands from the danger zone. I

1 simple embodiment of the invention is illustrated in the drawings, Wherein Figure l is a front view oi a press equipped with the safety device. Fig. 2 is a side view of the safety device and a portion of the machine fi'snie.

Rel ewing t0 the drawings, a denotes a which has been selected for illustration, 2) the vertically traveling heed carrying the upper die; 0 is a shaft rotatitbly supported in hearings (Z, 0?, at one side of the machine and to which is secured seem 6 provided with double faces 6, e The cam is edf'ustehle elong the shaft to vary the ere tent of its i'otstion.

f a rigid awn secured to the traveling head and carrying at its end a roller 9 which is adapted to cooperate with one of the faces of the cam e.

72 is s lever secured to the lower end of the shaft (2 end connected by links 6 with e strep j which is intended to loe secured? about the operatives hand. i

It will heseen that as the head 5 moves downwardly the rolleng st the end of the arm f, acting through the cam 0, will cause the rotation of the shaft 0 enclthe consequent swinging of the lever h, and if the operative l es not removed his hand, the lever it, connected with the strap 9' throug h the links i, will pull his hand out of the dhngei' zone. The extent of the swinging move ment of the lever ii is determined by the felative position of the cam c with respect to the roller g, and can he veried by the adjust ment of the cam along the shai'tc. In the Oldlllfilj use oi. thedevice, the roller g will not travel the full length ofthe cem surnce. By adjusting the cam rotsrily on the shaft 0 and swinging" the lever it amend so Specification of Lettei's Eetent. Put; 1

Application filed February 16, 1914. heriel No. s1

crating Witi said cnm, lever that it lies at the side of theiniiehine, thus causing the roller to cohpei'ete With. the cam surface e, the mechanism be utilised foioperations which require. the stool: te he :iied in u; the side oi: the machine.

While I have described a simple embodi ment of the invention I am eweie that it is susceptible of various changes end modifications which would come Within the scope 01": the appended claims.

I claim my invention 1. in ii safety device of the chsinctei" scribed, the oemhinetion with e- Inechine end one of its me parts, of n I'cterily mcunted shaft, a leve secured thereto, :11. hsJnd-engag ng strep connected with the lever, and coopemtingniesns on said moving pert end shaft for causing a rotary movement oi the letter and-its connected parts during e pot tion of the longitudinal motion of the infil ing part of the machine.

2. In a. safety device of the character described, the combination. with a machine and one of its moving; pints, of e. hand-engaging strap, :1 lever from which said pended, and means on said moving cent upetc-- tusted upon the movement of said i no'vine; part to move said lever and its suspended eretively connected with said lever an psi 5.

in :1. safety device cf the character described, the combination. with a machine and one 01? its moving parts, of a. shaft roterilv mounted in hearings on, said machine, s. cei'h secured to said shaft, an arm on inc"; part cooperating with said earn, :9. levee cured to said shaft. and n. linndeneeeinh' strep suspended from setid levee. O V o e. in safety device of the chm-cote described, the combination with sinschine cool one of its moving parts, of a shaft retard" mounted in hearings on said machine, it cein secured to the shaft end adjustable heth ion gitudinslgly and mini-i137 thereon, an arm on said moving pert cooperating with said cein. a lever secured to said shaft, and 2t hand-en gaging; strep suspended from said levee.

5. In e safety device of the charectei" described, the combination "with a nmchine and one of its moving," pants, at a shaft I'Cvifilllii mounted in hearings on said machine, it double-faced cnmvsecnred to the shaft end adjustable both longitudinally and lfllittliily thereon, en ei'ni on seid moving; pest colic to I strap is suses said shaft, and a handengeging strap suspended from said lever.

6.1m a safety device of the character de I scribed, the combinatioh with a machine and a vertically reciprocating head, of an arm se- .eured to said head ehd projeetingto the side 10 tive relation with the end of said arm, suid of the machine, a shaft rotzu ily mounted in bearings at the side of the machine, a doublefaced cam secured to said shaft m c06pem- 

